What you just did is called double speak. The use of deliberate euphemistic, ambiguous or obscure language. For John Bolton's statement to reach the level of your understanding it would have had to been displayed as run on sentencing.

"because the success of Ukraine maintaining it's freedom eh it's system of representative government eh a free market economy free of corruption"

We know, as it can be seen and heard, that what John Bolton said was:

"because the success of Ukraine maintaining it's freedom, eh, it's system of representative government, eh, a free market economy free of corruption"

The use of "eh" in between sentences is used, in this case, to show confirmation of the prior statement as a stand alone sentence before proceeding with the next statement.

eh: used as an interrogative utterance, usually expressing surprise, doubt or seeking confirmation.

Which severely undermines your statement of John Bolton's intent...

"So what's the big deal, John Bolton says in this clip the success of Ukraine maintaining it's free market economy free of corruption is a high priority of the United States"

John Bolton never used the word maintaining when talking about a free market economy free of corruption. What John Bolton stated was in line with this:

"because the success of Ukraine maintaining it's freedom, (from Russia's aggression(s)), eh, it's system of representative government, (free from people like Joe Biden threats to without aid)eh, a free market economy free of corruption (that statement in itself does not mean it's free of corruption, that statement means without outside influence or influence by rich oligarch's) To try and sell it as meaning anything else is totally absurd when Ukraine is known as the corruption capitol of the world.